// Package models provides data models for the Yandex Music API.
package models

import (
	"encoding/json"
)

// ArtistTracks represents a page of tracks by an artist.
type ArtistTracks struct {
	BaseModel
	Tracks []Track `json:"tracks"`
	Pager  *Pager  `json:"pager"`
}

// DeJSON deserializes an ArtistTracks from JSON data.
func (at *ArtistTracks) DeJSON(data []byte, c ClientInterface) (Model, error) {
	var raw map[string]json.RawMessage
	if err := json.Unmarshal(data, &raw); err != nil {
		return nil, err
	}

	tracks := &ArtistTracks{BaseModel: *NewBaseModel(c)}

	if v, ok := raw["tracks"]; ok {
		var trackList []Track
		if err := json.Unmarshal(v, &trackList); err == nil {
			tracks.Tracks = trackList
		}
	}
	if v, ok := raw["pager"]; ok {
		var pager Pager
		if err := json.Unmarshal(v, &pager); err == nil {
			tracks.Pager = &pager
		}
	}

	return tracks, nil
}

// DeList deserializes a list of ArtistTracks from JSON data.
func (at *ArtistTracks) DeList(data []byte, c ClientInterface) ([]Model, error) {
	var rawList []json.RawMessage
	if err := json.Unmarshal(data, &rawList); err != nil {
		return nil, err
	}

	result := make([]Model, 0, len(rawList))
	for _, item := range rawList {
		tracks := &ArtistTracks{BaseModel: *NewBaseModel(c)}
		if err := json.Unmarshal(item, tracks); err != nil {
			continue
		}
		result = append(result, tracks)
	}
	return result, nil
}